Laser diode self-mixing interferometry for velocity measurements

Alexandra S. Alexandrova, Vasilis Tzoganis, Carsten P. Welsch

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

A diode laser velocimeter based on laser self-mixing has been developed and characterized as a reliable, precise, comparably cheap, and compact monitor. The resolution of this sensor at different incident angles and for a variety of solid and liquid targets moving at velocities between 0.1 and 50 m?s is presented. This includes a theoretical analysis of the underlying measurement principle, highlighting possibilities to extend the measurement capabilities to even higher velocities by altering the sensor design. Finally, an outlook on future applications of the sensor for detailed studies of supersonic gas jets used in beam diagnostics and atomic physics applications is given.

Original languageEnglish
Article number034104
JournalOptical Engineering
Volume54
Issue number3
DOIs
StatePublished - Mar 2015
Externally publishedYes

Funding

FundersFunder number
Science and Technology Facilities CouncilST/G008248/1

    Keywords

    • gas-jet profile measurement
    • laser interferometry
    • laser sensors
    • optical feedback
    • self-mixing
    • semiconductor laser
    • velocimetry
    • velocity measurement

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